One Direction star corrects fan's grammar during concert

Harry Styles did the most amazing thing to a fan during a One Direction concert last weekend.

While performing on stage with the other members of group, Kendall Jenner's ex-boyfriend realized one young fan holding up a placard carrying the message, "Hi Harry, Your So Nice."

But the singer couldn't let poor grammar slide. He asked the fan to send forth the placard and a bold marker and he corrected the message. "Hi Harry, You're so Nice," it later read.

The young fan who made the error took the lesson in stride, tweeting her thanks at Style for his corrections.

Watch what happened between Styles and his fan below: